Built a treehouse with my kids
Spent the last month building a treehouse in our backyard with my two boys. We did it together, I showed them how to use tools, measure, nail stuff. When we finished and they climbed up there for the first time their faces were priceless. Now that's their favorite spot in the whole world and they want to spend every afternoon up there. Totally worth every blister and sore muscle.
Projects like this are what it's all about. Your kids learned actual skills while spending quality time with dad. That's the win right there.